invalid testnet endpoint https://btc-testnet.horizontalsystems.xyz/api

[ieow]

getting error when testing in testnet (https://btc-testnet.horizontalsystems.xyz/api )

error: Error Domain=NSURLErrorDomain Code=-1003 "A server with the specified hostname could not be found."

[hanxianlong]

horizontal systems closed all the test node, this kit will try the the other nodes automatically.

"testnet-seed.bitcoin.petertodd.org", // Peter Todd
"testnet-seed.bitcoin.jonasschnelli.ch", // Jonas Schnelli
"testnet-seed.bluematt.me", // Matt Corallo
"testnet-seed.bitcoin.schildbach.de", // Andreas Schildbach
"bitcoin-testnet.bloqseeds.net", // Bloq

[ieow]

Thanks for the reply!
The kit do not try other nodes automatically for me though...
Anyway I tried the 5 host you listed

"testnet-seed.bitcoin.petertodd.org", // Peter Todd. -> no valid endpoint (404)
"testnet-seed.bitcoin.jonasschnelli.ch", // Jonas Schnelli -> Time out
"testnet-seed.bluematt.me", // Matt Corallo. -> Time out
"testnet-seed.bitcoin.schildbach.de", // Andreas Schildbach -> not reachable ( ping )
"bitcoin-testnet.bloqseeds.net", // Bloq -> not reachable -> ping

I am wondering if the kit support other api like mempool.space
https://mempool.space/testnet/docs/api/rest#get-address-transactions

[hanxianlong]

@ieow just try the following command, the first two nodes worked well, you can check whether your local network can reached them well.
and mempoll is just an explorer, I'm not sure whether it provides a full node.

telnet testnet-seed.bitcoin.jonasschnelli.ch 18333

Trying 71.13.92.62... Connected to seed.tbtc.petertodd.net. Escape character is '^]'. ^] telnet> quit Connection closed.

telnet testnet-seed.bitcoin.jonasschnelli.ch 18333 Trying 52.193.79.181... Connected to testnet-seed.bitcoin.jonasschnelli.ch. Escape character is '^]'.

[hanxianlong]

[ieow]

Sorry, I under provide the informations.
The issue I have is with the apiTransactionProvider which use
https://btc-testnet.horizontalsystems.xyz/api during testnet

        let apiTransactionProvider: IApiTransactionProvider?
        switch networkType {
        case .mainNet:
            let hsBlockHashFetcher = HsBlockHashFetcher(hsUrl: "https://api.blocksdecoded.com/v1/blockchains/bitcoin", logger: logger)

            if case let .blockchair(key) = syncMode {
                let blockchairApi = BlockchairApi(secretKey: key, chainId: network.blockchairChainId, logger: logger)
                let blockchairBlockHashFetcher = BlockchairBlockHashFetcher(blockchairApi: blockchairApi)
                let blockHashFetcher = BlockHashFetcher(hsFetcher: hsBlockHashFetcher, blockchairFetcher: blockchairBlockHashFetcher, checkpointHeight: checkpoint.block.height)

                apiTransactionProvider = BlockchairTransactionProvider(blockchairApi: blockchairApi, blockHashFetcher: blockHashFetcher)
//                    let blockchainComProvider = BlockchainComApi(url: "https://blockchain.info", blockHashFetcher: blockHashFetcher, logger: logger)
//                    apiTransactionProvider = BiApiBlockProvider(restoreProvider: blockchainComProvider, syncProvider: blockchairProvider, apiSyncStateManager: apiSyncStateManager)
            } else {
                apiTransactionProvider = BlockchainComApi(url: "https://blockchain.info", blockHashFetcher: hsBlockHashFetcher, logger: logger)
            }
        case .testNet:
            apiTransactionProvider = BCoinApi(url: "", logger: logger)
        case .regTest:
            apiTransactionProvider = nil
        }

BitcoinKit.Swift/Sources/BitcoinKit/Classes/Core/Kit.swift

Line 60 in 683a8ca

apiTransactionProvider = BCoinApi(url: "https://btc-testnet.horizontalsystems.xyz/api", logger: logger)

I think the full node do not provide the api needed for the apiTransactionProvider...

may be I could assign the apiTransactionProvider as nil?

[hanxianlong]

Yeah, you're correct. the full node does not provide the http or https api, we should use the explorer api here.
You can't assign the txProvider as nil. If you'd like to use the mempool as your explorer, you should implement the logic by yourself.
I just implementted the regtest logic with an open source explorer days before.

[ieow]

created a pr here for using mempoolSpace for apiTransactionProvider
horizontalsystems/BitcoinCore.Swift#33